Aiming at the fact that discontinuities in rock mass exhibit different orientations, uniaxial compression tests of resin specimens containing a strike-inconsistent fissure pair were carried out to investigate the failure behaviour of the ligaments. Combined with computerized tomography scanning technology, cracking behaviour and ligament failure pattern were revealed. The failure characteristics and mechanical properties of specimens were studied. The results indicate that the primary cracks generally initiate at a local point of the pre-existing fissure tip, then integrate into a wavy-shaped crack, and develop into a large wrapping crack over time. With the variation of fissure deflection angle, the ligament exhibits three failure patterns: spalling failure, coalescence of cracks at the proximal end and incoherence at the distal end, and torsional failure. The crack initiation stress generally exhibits an increasing trend as fissure deflection angle increases. Peak stress and strain difference are closely related to fissure deflection angle and failure pattern. The mechanical properties of specimens with parallel fissure deflection are the most affected by the fissure deflection angle, followed by those with steep fissure deflection, and those with gentle fissure deflection are minimally affected.

中文翻译：

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单轴压缩下冲击不一致裂隙对间韧带破坏行为的实验研究

针对岩体中不连续面表现出不同取向的事实，对含有走向不一致裂隙对的树脂试件进行了单轴压缩试验，研究了韧带的破坏行为。结合计算机断层扫描技术，揭示了断裂行为和韧带断裂模式。研究了试件的破坏特性和力学性能。结果表明，初生裂纹一般在原有裂隙尖端的局部点开始，然后融合成波浪形裂纹，并随着时间的推移发展成大的包裹裂纹。随着裂隙偏转角的变化，韧带表现出三种破坏模式：剥落破坏、近端裂缝合并和远端不连贯，和扭转失效。随着裂隙偏转角的增加，裂纹起始应力通常呈现增加的趋势。峰值应力和应变差与裂隙偏转角和破坏模式密切相关。平行裂隙偏转试样的力学性能受裂隙偏转角的影响最大，其次是陡峭的裂隙偏转，温和的裂隙偏转受其影响最小。